Packing material



Patented July 14, 1936 UNITED STATES PATENT OFFICE PAGKIN G MATERIAL Ernst Studt, Nordenham,

to Norddeutsche Seekabelwerke schaft, Nordenham, Germany assignor Aktiengesell- No Drawing. Application February 8, 1935, Serial No. 5,685. In Germany February 28, 1934 In the concurrent application, Serial No. 693,213, I have described a method of manufacturing bands and foils which are bendable and yielding in every direction from polymerization 5 products of aryl oleflnes, more particularly polystyrol. It has been found that thin foils of polystyrol or the like obtained according to the method described in the said patent are especially suitable for use as a packing material for comestibles,

0 tobacco products or other materials which are 0 nipulated in the same simple manner as foils of cellulose skin.

An especially advantageous method of manufacturing thin foils of polystyrol or the like consists in that the heated mass is pressed out through an annular nozzle and the tube which is thereby produced is drawn over a stretching 5 device provided at the centre piece of the nomle. The stretching device may consist of two guiding runners which cause the tube of polystyrol to be radually widened as it is being drawn out.

The sticking of the foils of polystyrol or the 10 like can be eii'ected in a very simple manner by moistening their surface with benzene or mixtures of benzene with benzine or alcohol.

What I claim is:

A packing material for goods sensitive to mois- 1s ture, consisting of bendable foils obtained by iongitudinal and transverse stretching of sheet-like structures of poiystyrol.

mar s'rum'. 

